/* ============================================
   Responsive Design Styles
   Mobile-first approach
   ============================================ */

/* Mobile: < 768px */
@media (max-width: 767px) {
    :root {
        --fs-5xl: 2.5rem;
        --fs-6xl: 3rem;
        --spacing-4xl: 4rem;
        --spacing-3xl: 3rem;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    /* Header */
    .nav-list {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background-color: var(--bg-white);
        flex-direction: column;
        padding: var(--spacing-lg);
        box-shadow: var(--box-shadow-lg);
        transform: translateX(-100%);
        transition: transform var(--transition-base);
        z-index: 999;
        align-items: flex-start;
        gap: var(--spacing-md);
    }
    
    .nav-list.active {
        transform: translateX(0);
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    /* Logo */
    .logo img {
        height: 50px;
        max-height: 50px;
    }
    
    /* Hero */
    .hero {
        min-height: 500px;
    }
    
    .hero h1 {
        font-size: var(--fs-4xl);
    }
    
    .hero p {
        font-size: var(--fs-lg);
    }
    
    /* Ensure video doesn't cause performance issues on mobile */
    .hero-video {
        display: block;
    }
    
    
    /* Cards */
    .card-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .industries-grid {
        grid-template-columns: 1fr;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    /* Contact */
    .contact-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    /* Footer */
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    /* Section spacing */
    .section {
        padding: var(--spacing-2xl) 0;
    }
}

/* Tablet: 768px - 1024px */
@media (min-width: 768px) and (max-width: 1024px) {
    .card-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .industries-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-container {
        gap: var(--spacing-xl);
    }
}

/* Large Desktop: > 1440px */
@media (min-width: 1440px) {
    :root {
        --container-max-width: 1400px;
    }
    
    .card-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Print Styles */
@media print {
    .header,
    .footer,
    .btn,
    .mobile-menu-toggle {
        display: none;
    }
    
    .section {
        page-break-inside: avoid;
        padding: var(--spacing-lg) 0;
    }
}